tpl/tplimpl: Copy embedded HTML table render hook to each output format

Closes #13351

tpl/tplimpl/templatestore.go

@@ -1018,7 +1018,7 @@ func (s *TemplateStore) allRawTemplates() iter.Seq[tpl.Template] {
 }
 
 func (s *TemplateStore) insertEmbedded() error {
-	return fs.WalkDir(embeddedTemplatesFs, ".", func(path string, d fs.DirEntry, err error) error {
+	return fs.WalkDir(embeddedTemplatesFs, ".", func(tpath string, d fs.DirEntry, err error) error {
 		if err != nil {
 			return err
 		}
@@ -1026,7 +1026,7 @@ func (s *TemplateStore) insertEmbedded() error {
 			return nil
 		}
 
-		templb, err := embeddedTemplatesFs.ReadFile(path)
+		templb, err := embeddedTemplatesFs.ReadFile(tpath)
 		if err != nil {
 			return err
 		}
@@ -1034,7 +1034,7 @@ func (s *TemplateStore) insertEmbedded() error {
 		// Get the newlines on Windows in line with how we had it back when we used Go Generate
 		// to write the templates to Go files.
 		templ := string(bytes.ReplaceAll(templb, []byte("\r\n"), []byte("\n")))
-		name := strings.TrimPrefix(filepath.ToSlash(path), "embedded/templates/")
+		name := strings.TrimPrefix(filepath.ToSlash(tpath), "embedded/templates/")
 
 		insertOne := func(name, content string) error {
 			pi := s.opts.PathParser.Parse(files.ComponentFolderLayouts, name)
@@ -1064,6 +1064,19 @@ func (s *TemplateStore) insertEmbedded() error {
 			return nil
 		}
 
+		// Copy the embedded HTML table render hook to each output format.
+		// See https://github.com/gohugoio/hugo/issues/13351.
+		if name == path.Join(containerMarkup, "render-table.html") {
+			for _, of := range s.opts.OutputFormats {
+				path := paths.TrimExt(name) + "." + of.Name + of.MediaType.FirstSuffix.FullSuffix
+				if err := insertOne(path, templ); err != nil {
+					return err
+				}
+			}
+
+			return nil
+		}
+
 		if err := insertOne(name, templ); err != nil {
 			return err
 		}

tpl/tplimpl/templatestore_integration_test.go

@@ -1508,3 +1508,43 @@ mytexts|safeHTML: {{ partial "mytext.txt" . | safeHTML }}
 		"mytexts|safeHTML: <div>mytext</div>",
 	)
 }
+
+func TestIssue13351(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['page','rss','section','sitemap','taxonomy','term']
+[outputs]
+home = ['html','json']
+[outputFormats.html]
+weight = 1
+[outputFormats.json]
+weight = 2
+-- content/_index.md --
+---
+title: home
+---
+a|b
+:--|:--
+1|2
+-- layouts/index.html --
+{{ .Content }}
+-- layouts/index.json --
+{{ .Content }}
+`
+
+	b := hugolib.Test(t, files)
+	b.AssertFileContent("public/index.html", "<table>")
+	b.AssertFileContent("public/index.json", "<table>")
+
+	f := strings.ReplaceAll(files, "weight = 1", "weight = 0")
+	b = hugolib.Test(t, f)
+	b.AssertFileContent("public/index.html", "<table>")
+	b.AssertFileContent("public/index.json", "<table>")
+
+	f = strings.ReplaceAll(files, "weight = 1", "")
+	b = hugolib.Test(t, f)
+	b.AssertFileContent("public/index.html", "<table>")
+	b.AssertFileContent("public/index.json", "<table>")
+}